地殻・上部マントルの電気比抵抗構造：観測の原理・精度と物性データの現状

• 市原 寛

  海洋研究開発機構地球内部ダイナミクス領域

• 市來 雅啓

  東北大学大学院理学研究科地震・噴火予知研究観測センター

書誌事項

タイトル別名

• An overview of electrical resistivity in the crust and upper mantle: principle of magnetotelluric method, accuracy and resolution of resistivity modeling, and electrical resistivity feature of crustal and mantle rocks and minerals
• チカク ジョウブ マントル ノ デンキヒ テイコウ コウゾウ カンソク ノ ゲンリ セイド ト ブッセイ データ ノ ゲンジョウ

抄録

  Electrical resistivity is known as a good indicator for geo-fluid distribution especially in the crust and upper mantle. In this paper, we introduced physical concept of electrical resistivity in solid, liquid, and their mixing law, which can explain resistivity of crust and upper mantle. We also introduced magnetotelluric method, a common exploration method to image resistivity distribution in the earth, and modeling (inversion) method for resistivity distribution. Because resolution of inverted resistivity model from the magnetotelluric data depend on depth, resistivity, density of observation station and smoothness constraint, the model should be carefully interpreted. The magnetotelluric method has been applied for various tectonic settings. Many studies discovered low resistivity zones probably indicating fluid-rich area in or beneath the earthquake faults. In the volcanic zones, partial melt and hydrothermal areas were inferred based on three-dimensional modeling. Intensive MT surveys and newly developed interpretation techniques such as correction method of bathymetry effect and 3-D inversion method enable us to image resistivity of subduction slab and oceanic plate.<br>

収録刊行物

• 岩石鉱物科学

  岩石鉱物科学 40 (3), 73-90, 2011

  一般社団法人　日本鉱物科学会

キーワード

• Magnetotelluric
• Geophysical inversion
• Resistivity structure
• Subduction zone
• Electrical resistivity of rocks and minerals

詳細情報

• CRID: 1390001206525416448
• NII論文ID: 10029454754
• NII書誌ID: AA1146088X
• DOI: 10.2465/gkk.110131b
• ISSN: 13497979
• ISSN: 1345630X
• NDL書誌ID: 11179378
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11179378
• Web Site: https://www.jstage.jst.go.jp/article/gkk/40/3/40_110131b/_pdf
• 本文言語コード: ja
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可